android gRPC 简单使用

gRPC 可以像调用方法一样进行网络请求
github地址：https://github.com/grpc/grpc-java

使用：

1.proto文件放置到 src/main/proto
2. 根目录gradle

        classpath "com.google.protobuf:protobuf-gradle-plugin:0.8.17"

3. module gradle配置

plugins {
...
    id 'com.google.protobuf'
}

android {
  ...
}

protobuf {
    protoc { artifact = 'com.google.protobuf:protoc:3.17.2' }
    plugins {
        grpc { artifact = 'io.grpc:protoc-gen-grpc-java:1.40.0' // CURRENT_GRPC_VERSION
        }
    }
    generateProtoTasks {
        all().each { task ->
            task.builtins {
                java { option 'lite' }
            }
            task.plugins {
                grpc { // Options added to --grpc_out
                    option 'lite' }
            }
        }
    }
}

dependencies {
    //gRPC
    implementation 'io.grpc:grpc-okhttp:1.40.0' // CURRENT_GRPC_VERSION
    implementation 'io.grpc:grpc-protobuf-lite:1.40.0' // CURRENT_GRPC_VERSION
    implementation 'io.grpc:grpc-stub:1.40.0' // CURRENT_GRPC_VERSION
    compileonly 'org.apache.tomcat:annotations-api:6.0.53'

    implementation project(':common')
}

4. 简单使用（伪代码）

	//创建channel
   ManagedChannel channel = ManagedChannelBuilder.forAddress(ip, port).usePlaintext().build();
   //创建阻塞请求服务
   ServiceBlockingStub serviceBlockingStub = ServiceGrpc.newBlockingStub(channel);
  //创建请求
   Request request = Request.newBuilder().build();
  //调用服务getData方法
   serviceBlockingStub.getData(request);

5. stream接收(伪代码)

	//创建channel
   ManagedChannel channel = ManagedChannelBuilder.forAddress(ip, port).usePlaintext().build();
   //创建请求服务
   ServiceBlockingStub serviceBlockingStub = ServiceGrpc.newStub(channel);
  //创建请求
   Request request = Request.newBuilder().build();
  //调用服务getData方法, 并设置回调
   serviceBlockingStub.getData(request, new StreamObserver() {
                @Override
                public void onNext(Data data) {
                    Logger.e("Stream", "onNext");
                }

                @Override
                public void onError(Throwable t) {
                    Logger.e("Stream", "onError");
                }

                @Override
                public void onCompleted() {
                    Logger.e("Stream", "onCompleted");
                }
            });